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Home >> GMC >> 1991 >> Value Van 7.4 N >> Repair and Diagnosis >> External Pages >> Different car >> Section 90 (3.8L V6 Gas - VIN [L]) >> Overhaul >> Cylinder Head Overhaul >> Valves

Cylinder Head Overhaul: Valves

WARNING: This page is about a different car, the 1995 Plymouth Grand Voyager, 1995 Dodge Grand Caravan, and 1995 Chrysler Town & Country. However, it is still accessible from the selected car via links, so may be relevant.
  1. Ensure valve margin, head diameter, refinish length and stem diameter are within specification. See VALVES & VALVE SPRINGS SPECIFICATIONS  table under ENGINE SPECIFICATIONS. Valves are available with oversize valve stems of .005" (.13 mm), .015" (.38 mm) and .030" (.76 mm).
  2. Once valve and valve spring is installed in cylinder head, valve tip height must be checked. Measure distance from tip of valve stem to surface on cylinder head, just below the spring seat.
  3. Valve tip height should be within specification. See VALVES & VALVE SPRINGS SPECIFICATIONS  table under ENGINE SPECIFICATIONS. Grind end of valve stem to obtain correct valve tip height (if necessary).
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